{
  "cveId": "CVE-2021-47509",
  "url": "https://patchblox.com/security/cve/CVE-2021-47509",
  "summary": "CVE-2021-47509 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47509, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ALSA: pcm: oss: Limit the period size to 16MB  S...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ALSA: pcm: oss: Limit the period size to 16MB  Set the practical limit to the period size (the fragment shift in OSS) instead of a full 31bit; a too large value could lead to the exhaust of memory as we allocate temporary buffers of the period size, too.  As of this patch, we set to 16MB limit, which should cover all use cases.",
  "published": "2024-05-24T15:15:11Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0024,
  "epssPercentile": 0.15154,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47509",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47509",
      "released": "2024-05-24T15:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47509",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47509",
      "released": "2024-05-24T15:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47509",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47509",
      "released": "2024-05-24T15:15:11Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}